| Package | Description | 
|---|---|
| org.apache.hadoop.yarn.api.protocolrecords | |
| org.apache.hadoop.yarn.api.records | |
| org.apache.hadoop.yarn.api.resource | API related to resources. | 
| org.apache.hadoop.yarn.util.constraint | Package org.apache.hadoop.yarn.util.constraint contains classes
 which is used as utility class for placement constraints. | 
| Class and Description | 
|---|
| PlacementConstraint PlacementConstraintrepresents a placement constraint for a resource
 allocation. | 
| Class and Description | 
|---|
| PlacementConstraint PlacementConstraintrepresents a placement constraint for a resource
 allocation. | 
| Class and Description | 
|---|
| PlacementConstraint PlacementConstraintrepresents a placement constraint for a resource
 allocation. | 
| PlacementConstraint.AbstractConstraint Abstract class that acts as the superclass of all placement constraint
 classes. | 
| PlacementConstraint.And Class that represents a composite constraint that is a conjunction of other
 constraints. | 
| PlacementConstraint.CardinalityConstraint Class that represents a cardinality constraint. | 
| PlacementConstraint.CompositeConstraint Class that represents composite constraints, which comprise other
 constraints, forming a constraint tree. | 
| PlacementConstraint.DelayedOr Class that represents a composite constraint that comprises a list of timed
 placement constraints (see  PlacementConstraint.TimedPlacementConstraint). | 
| PlacementConstraint.Or Class that represents a composite constraint that is a disjunction of other
 constraints. | 
| PlacementConstraint.SingleConstraint Consider a set of nodes N that belongs to the scope specified in the
 constraint. | 
| PlacementConstraint.TargetConstraint Class that represents a target constraint. | 
| PlacementConstraint.TargetExpression Class representing the target expressions that are used in placement
 constraints. | 
| PlacementConstraint.TargetExpression.TargetType Enum specifying the type of the target expression. | 
| PlacementConstraint.TimedPlacementConstraint Represents a timed placement constraint that has to be satisfied within a
 time window. | 
| PlacementConstraint.TimedPlacementConstraint.DelayUnit The unit of scheduling delay. | 
| PlacementConstraint.Visitable Interface used to enable the elements of the constraint tree to be visited. | 
| PlacementConstraint.Visitor Visitor API for a constraint tree. | 
| Class and Description | 
|---|
| PlacementConstraint PlacementConstraintrepresents a placement constraint for a resource
 allocation. | 
| PlacementConstraint.AbstractConstraint Abstract class that acts as the superclass of all placement constraint
 classes. | 
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